First, there is a real definition of cog..... from dictionary.com....
a person who plays a minor part in a large organization, activity, etc.:
I played a 'role' in a large organization.... one that had over 200,000 people... so almost everybody there was a cog.... and at times my role might have been considered important (at one point I was in charge of global interoffice pricing, but still only a VP)... but, someone did it well before I was there and someone did it well after I was gone.... so, kinda fits the definition...
I do not feel insignificant at all... I was highly valued in every position that I had... and I did a good job in all of them also... I have also had a good life and can say I am very successful....
But, I am nothing 'special' like an Elon Musk or Steve Jobs... people that will be remembered for generations (if not longer)....
I do not need to try and aggrandize my role in life as some might...
So, reading the definition, how are you not a cog? Just because you 'feel' you are not?